[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

WO2017094268A1 - Dispositif de détermination de déformation pour dispositif de fabrication de feuille de carton ondulé, dispositif de correction de déformation pour dispositif de fabrication de feuille de carton ondulé et système de fabrication de feuille de carton ondulé - Google Patents

Dispositif de détermination de déformation pour dispositif de fabrication de feuille de carton ondulé, dispositif de correction de déformation pour dispositif de fabrication de feuille de carton ondulé et système de fabrication de feuille de carton ondulé Download PDF

Info

Publication number
WO2017094268A1
WO2017094268A1 PCT/JP2016/055213 JP2016055213W WO2017094268A1 WO 2017094268 A1 WO2017094268 A1 WO 2017094268A1 JP 2016055213 W JP2016055213 W JP 2016055213W WO 2017094268 A1 WO2017094268 A1 WO 2017094268A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheet
warpage
corrugated
corrugated cardboard
warp
Prior art date
Application number
PCT/JP2016/055213
Other languages
English (en)
Japanese (ja)
Inventor
英生 水谷
章 荻野
Original Assignee
三菱重工印刷紙工機械株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=58796806&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2017094268(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 三菱重工印刷紙工機械株式会社 filed Critical 三菱重工印刷紙工機械株式会社
Priority to EP16870209.0A priority Critical patent/EP3369564B2/fr
Priority to US15/779,527 priority patent/US11110680B2/en
Publication of WO2017094268A1 publication Critical patent/WO2017094268A1/fr

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2831—Control
    • B31F1/284—Warp prevention
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F5/00—Attaching together sheets, strips or webs; Reinforcing edges
    • B31F5/04—Attaching together sheets, strips or webs; Reinforcing edges by exclusive use of adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F7/00—Processes not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0784—Auxiliary operations

Definitions

  • the present invention relates to a warpage determination device that determines the state of warpage of a corrugated cardboard sheet during manufacturing, and a warp correction device and a corrugated cardboard sheet manufacturing system that use the warpage determination device.
  • a corrugated cardboard sheet is produced by pasting the core that is fed to one liner (back liner) with glue to produce a single-stage sheet, and then bonding the other liner (front liner) to the center of the single-stage sheet.
  • each sheet back liner, front liner, single-stage sheet, cardboard sheet
  • Gluing is performed by the machine. At that time, if the heating amount and the pasting amount are not appropriate, the finished corrugated cardboard sheet is warped.
  • Patent Documents 1 to 3 There are techniques disclosed in Patent Documents 1 to 3 as techniques relating to the detection and correction of warpage of a corrugated cardboard sheet. Hereinafter, techniques disclosed in Patent Documents 1 to 3 will be described. In the description, reference numerals used in each document are shown in parentheses for reference.
  • the warpage detection device (5) comprising a plurality of displacement sensors (6), It is arranged between the double facer (2) and the slitter scorer (3), and based on the detection result of the warp detection device (5), the W.V. F [warp degree: Wrap Factor] is obtained.
  • each sheet when manufacturing a corrugated cardboard sheet by laminating each sheet, it is necessary to fully infiltrate the applied raw starch solution into each sheet, and then heat the raw starch solution to the gelling temperature to be gelled. There is.
  • the starch is made sticky by gelling the raw starch solution.
  • each sheet In order to make the raw starch solution applied to the sheet higher than the gelling temperature, each sheet is heated before and after bonding and during bonding, but when heated, the sheet shrinks because the retained moisture evaporates. To do. Therefore, until the pasting process is completed (until it passes through the double facer), each sheet constituting the corrugated board sheet is in a reduced state with a small amount of moisture, and after passing through the double facer, the air decreases as the sheet temperature decreases.
  • moisture equilibrium state It takes in moisture inside and stretches until it becomes balanced with moisture in the air (hereinafter referred to as moisture equilibrium state). For this reason, when there is a difference in the moisture content of each sheet when bonded with a double facer, the amount of elongation of each sheet differs in the moisture equilibrium state immediately after bonding, even if the cardboard sheet is not warped. Therefore, the cardboard sheet may be warped. Conversely, even if the corrugated cardboard sheet is warped immediately after bonding, the corrugated cardboard sheet may not be warped in the moisture equilibrium state.
  • the warp detection device (5) is installed between the double facer (2) and the slitter scorer (3), so that warp detection is performed at a location relatively close to the double facer (2). Is called. For this reason, there is a possibility that the warpage of the corrugated cardboard sheet is detected in a state far from the moisture equilibrium state.
  • warpage is detected by the conveyor (191) or the stack unit (192) of the stacker (19).
  • the conveyor (191) and the stack part (192) of the stacker (19) are separated from the double facer as compared with the detection position of the technique disclosed in Patent Document 1, and are in a water equilibrium state or a state close to a water equilibrium state. It can be expected to detect the warpage of the cardboard sheet.
  • the cardboard sheets on the conveyor (191) of the stacker (19) and the cardboard sheets stacked on the stacker (19) are cut along the sheet conveying direction by a slitter scorer (hereinafter also referred to as slitting) to be a plurality of sheets.
  • a slitter scorer hereinafter also referred to as slitting
  • a cut-off device It is trimmed and cut along the sheet width direction (hereinafter also referred to as cut-off) by a cut-off device. If there is a difference between the amount of extension of the single-stage sheet and the amount of extension of the front liner, and if warping occurs if it is not trimmed, both corrugated sheets will be removed. Warping occurs in the ditch. If the heating of the sheets constituting the corrugated cardboard sheet is not uniform in the sheet width direction, for example, if the sheet is not picked up, for example, it is upward at one end in the sheet width direction and downward at the other end in the sheet width direction. S-shaped warping occurs, but when this cardboard sheet is slit in half and removed in two, one cardboard sheet is warped upward and the other cardboard sheet is warped downward. Will occur.
  • An object of the present invention is to provide a warpage determination device for a corrugated sheet manufacturing apparatus, a warpage correction device for a corrugated sheet manufacturing apparatus, and a corrugated sheet manufacturing system capable of correcting warpage accurately and quickly based on the determination.
  • the warpage determination device of the corrugated board manufacturing apparatus of the present invention cuts a corrugated sheet web conveyed along the sheet conveying direction longitudinally with a slitter scorer, thereby producing a plurality of corrugated cardboard sheets.
  • the plurality of corrugated cardboard sheets are cut off along the sheet width direction by a cut-off, and then the plural corrugated cardboard sheets are stacked on the sheet stacking portion of the stacker.
  • a warpage determination device for a corrugated cardboard manufacturing apparatus which respectively determines the warpage state of a plurality of corrugated cardboard sheets, wherein the sheet transport direction downstream side of the slitter scorer and the upstream side of the sheet stacking direction of the sheet stacking direction.
  • a displacement amount measuring means for measuring a displacement amount of the plurality of corrugated cardboard sheets, and According to a width dimension that is a dimension in the sheet width direction of a number of corrugated cardboard sheets, the measurement range of the displacement measuring means is divided and assigned to each of the plurality of corrugated cardboard sheets, and the allocated measurement range And a warpage state determination means for determining a warpage state of the corrugated cardboard sheet for each of the plurality of corrugated cardboard sheets based on the measurement value of the displacement amount measuring means.
  • the displacement amount measuring unit includes a plurality of displacement sensors arranged in the sheet width direction, and the warp state determining unit is configured to determine the plurality of corrugated cardboard sheets according to the width dimension of the plurality of corrugated cardboard sheets. It is preferable that the measurement range is assigned by assigning the displacement sensor to each of the plurality of corrugated cardboard sheets.
  • the displacement amount measuring unit analyzes an amount of displacement of the plurality of corrugated cardboard sheets based on information from the imaging unit including a plurality of pixels arranged corresponding to the sheet width direction, and information from the imaging unit.
  • the warpage state determination means assigns the plurality of pixels to each of the plurality of cardboard sheets according to the width dimension of the plurality of cardboard sheets. It is preferable to assign the measurement range.
  • the stacker includes a stacker conveyor that conveys the plurality of cardboard sheets to the upper part of the sheet stack, and the displacement measuring unit is cut by the cut-off and is being conveyed by the stacker conveyor. It is preferable to perform measurement on the corrugated cardboard sheet.
  • Each measurement by the displacement amount measuring means is repeatedly performed at a predetermined cycle (periodically with a predetermined time interval), and the warpage state determining means is provided for each of the corrugated cardboard sheets.
  • the measurement value of the displacement measuring means used for the determination of the warpage state is selected, and the selection is performed for each corrugated cardboard sheet so that the amount of change of the measured value of the displacement sensor with respect to the previous period is the corrugated cardboard sheet. It is preferable that the period is set on the basis of a period exceeding a threshold set in accordance with the thickness of the ditch.
  • the corrugated sheet web is vertically cut by the slitter scorer into a plurality of the corrugated cardboard sheets having the same width dimension
  • the warpage state determination means includes a preset width dimension of the corrugated sheet web and Obtaining the number of the corrugated cardboard sheet, obtaining the width dimension of the corrugated sheet sheet based on the width dimension of the corrugated sheet web and the number of the sheet, the plurality of corrugated cardboard based on the width dimension of the corrugated sheet sheet It is preferable to determine the measurement range assigned to each sheet.
  • the warpage state determination unit acquires each width dimension of the plurality of corrugated sheet sheets set in advance, and each of the plurality of corrugated sheet sheets based on the width dimension of the plurality of corrugated sheet sheets.
  • the measurement range to be assigned to is determined.
  • the warpage state determination means does not use the measurement value of the displacement sensor within a predetermined distance from the longitudinal cutting position of the slitter scorer for the determination of the warpage state.
  • Each of the plurality of displacement sensors is provided with an adjustment mechanism that changes a position in the sheet width direction from a normal position, and the warp state determination unit is configured such that the normal position is determined from a vertical cutting position of the slitter scorer. It is preferable to control the adjustment mechanism so that the displacement sensor within a predetermined distance is separated from the vertical cutting position by the predetermined distance.
  • the warpage state determination means does not use a measurement value different from a representative value by a predetermined value or more among the measurement values of the displacement sensors assigned to the same corrugated cardboard sheet for determining the warpage state. Is preferred.
  • the warpage state determination means determines that the warpage state of the corrugated cardboard sheet is warped or warped based on the measurement value of the displacement amount measurement means
  • the warpage state determination means uses the measurement value of the displacement amount measurement means. Based on this, it is preferable to approximate the shape of the upper warp or the lower warp to an arc shape and obtain the amount of warpage of the corrugated cardboard sheet from the arc shape.
  • a warp correction device for a corrugated board manufacturing apparatus includes the warpage determination device for a corrugated board manufacturing apparatus according to any one of (4) to (13), and the warpage.
  • Warpage correction control for selecting and controlling a specific control element related to occurrence of the production sheet width warp shape from control elements of the corrugated board manufacturing apparatus based on the production sheet width warp shape determined by the determination device And a means.
  • the corrugated sheet manufacturing apparatus creates a single-stage sheet by laminating the core and the back liner by a single facer, and creates the corrugated sheet web by laminating the single-stage sheet and the front liner by a double facer.
  • the warp correction control means includes the sheet temperature It is preferable to set the control amount of the specific control element in a range in which the sheet temperature measured by the measuring means does not fall below a lower limit temperature set based on the gelation temperature of the glue used for the bonding. .
  • An operation state information acquisition unit that acquires operation state information related to an operation state of the corrugated sheet manufacturing apparatus, an order information acquisition unit that acquires order information related to the order of the cardboard sheet manufacturing apparatus, the operation state information, and the Based on the order information, the control amount calculating means for calculating the control amount of each control element of the corrugated sheet manufacturing apparatus, and the warpage of the corrugated sheet sheet is equal to or less than a predetermined amount, or the warpage of the corrugated sheet web is a predetermined amount
  • the quality information acquisition means for acquiring the fact that the warpage of the corrugated cardboard sheet is less than a predetermined amount or the warpage of the cardboard sheet web is less than the predetermined amount is acquired by the quality information acquisition means
  • Optimal operation state information storage means for storing information relating to a specific control element that affects the warp state of the vehicle as information relating to an optimal operation state in the order when the input is made by the quality information acquisition means, and the optimal operation
  • a corrugated board manufacturing system includes a corrugated sheet manufacturing system including the warp correction apparatus for a corrugated board manufacturing apparatus according to any one of (14) to (17). It is characterized by being.
  • the corrugated cardboard sheet is disposed downstream of the slitter scorer and upstream of the upper stack of the stacker. Since the displacement is detected, the measured value in the state where the corrugated sheet is close to the moisture equilibrium state after passing through the double facer, that is, the state close to the completion of the corrugated sheet production (completed state), is used to determine the warpage state of each corrugated sheet sheet. Can be determined.
  • the warpage state is determined by measuring the displacement of the corrugated cardboard sheet upstream from the upper part of the sheet stack, rather than measuring the displacement of the corrugated cardboard sheet stacked on the upper sheet stack, the warpage state is determined. It is possible to feed back to warp correction at an early stage. Therefore, the determination of the warpage state of the corrugated cardboard sheet can be made accurately and early in a state close to the corrugated sheet production completion state (completed state), and as a result, the warp correction is promptly performed based on this determination. be able to.
  • FIG. 1 is a schematic diagram showing an entire configuration of a corrugated board manufacturing system according to a first embodiment of the present invention.
  • FIG. 2 is a schematic diagram showing the configuration of the back liner preheater, the single facer, and the core preheater according to the first embodiment of the present invention.
  • FIG. 3 is a schematic view illustrating a partial configuration of the single-stage sheet preheater, the front liner preheater, the glue machine, and the double facer according to the first embodiment of the present invention.
  • FIG. 4 is a schematic view showing the configuration of the double facer according to the first embodiment of the present invention.
  • FIG. 5 is a schematic diagram showing the configuration of the stacker according to the first embodiment of the present invention.
  • FIG. 6 is a diagram for explaining warpage state determination according to the first embodiment of the present invention, and is a schematic plan view of a plurality of plate-like cardboard sheets conveyed on a stacker conveyor.
  • FIG. 7 is a diagram for explaining the displacement sensor according to the first embodiment of the present invention, and is a schematic perspective view of a plate-like cardboard sheet.
  • 8A and 8B are schematic diagrams for explaining a method for determining a warp shape according to the first embodiment of the present invention, and FIG. 8A is a diagram showing a positional relationship between a plate-like cardboard sheet and a displacement sensor; FIG. 8B is a diagram showing a correspondence relationship between the measured value of the displacement sensor and the warped shape of the plate-like cardboard sheet.
  • FIG. 9 is a schematic diagram for explaining a method for determining the production sheet width warpage shape according to the first embodiment of the present invention, and corresponds to the warpage shape of each plate-like corrugated cardboard sheet and the production sheet width warpage shape. It is a figure which shows a relationship.
  • FIG. 10 is a schematic diagram for explaining a method for determining a warpage amount according to the first embodiment of the present invention, and is a front view of a plate-like cardboard sheet.
  • FIG. 11A and FIG. 11B are schematic diagrams for explaining a method for determining a warpage state in consideration of shingling according to the first embodiment of the present invention, and FIG. 11A is a plate-like cardboard conveyed on a stacker conveyor.
  • FIG. 11A is a plate-like cardboard conveyed on a stacker conveyor.
  • FIG. 11B is a plan view showing a corrugated sheet web before being vertically cut.
  • FIG. 12 is a schematic diagram for explaining a method for determining a warpage state according to the first embodiment of the present invention, and is a plan view showing a plate-like cardboard sheet conveyed on a stacker conveyor.
  • FIG. 13 is a schematic diagram illustrating a configuration of a warpage determination device according to a second embodiment of the present invention.
  • 14A and 14B are schematic diagrams for explaining a displacement amount measurement and warpage determination method according to the second embodiment of the present invention.
  • FIG. 14A is an image (acquired image information) captured by an area sensor.
  • FIG. 14B is a diagram showing an example of the displacement information of the corrugated board sheet obtained from the image information of FIG. 14A.
  • a sheet conveying direction A horizontal direction orthogonal to the sheet conveying direction is referred to as a sheet width direction. Cutting the sheet material along the sheet conveyance direction is called vertical cutting, and cutting the sheet material along the sheet width direction is called cross cutting. Also, when there is no special explanation and it is described as upstream, it means upstream in the sheet conveyance direction, and similarly, when there is no special explanation and it is described as downstream, it means downstream in the sheet conveyance direction. To do. Further, when there is no special description, warpage of the cardboard sheet means warpage in the sheet width direction.
  • FIG. 1 is a schematic diagram showing an overall configuration of a corrugated board manufacturing system according to a first embodiment of the present invention.
  • the corrugated board manufacturing system according to the present embodiment includes a corrugated board manufacturing apparatus 1 and a production management apparatus 2 that controls the corrugated board manufacturing apparatus 1.
  • the corrugated board manufacturing apparatus 1 steps up a back liner preheater 10 that heats the back liner 20, a core preheater 12 that heats the core 21, and a core 21 heated by the core preheater 12 as main components.
  • the single facer 11 for bonding the back liner 20 heated by the back liner preheater 10, the single sheet preheater 13 for heating the single sheet 22 formed by the single facer 11, and the front liner for heating the front liner 23.
  • a pre-heater 14, a glue machine 15 for gluing to a single-stage sheet 22 heated by the single-stage sheet pre-heater 13, and a front liner 23 heated by the front liner pre-heater 14 are bonded to the single-stage sheet 22 glued by the glue machine 15.
  • Cut-off 18 for producing a plate-like corrugated sheet sheet (hereinafter also referred to as a plate-like corrugated cardboard sheet) 24C, which is a divided plate-like final product by cross-cutting 24B, and a stacker for stacking the plate-like corrugated board sheets 24C in the order of completion 19 is provided.
  • the corrugated cardboard sheet according to the present invention refers to a corrugated cardboard sheet web 24A vertically cut by the slitter scorer 17 (that is, a corrugated cardboard sheet web 24A divided vertically). It includes both the sheet cleaver 24B and the plate-like cardboard sheet cleaver 24C.
  • the corrugated board manufacturing apparatus 1 may be provided with a temperature sensor (sheet temperature measuring means) that measures the temperature of each of the sheets 20, 21, 22, 23, 24A, 24B, and 24C (in FIG. 1). Only the temperature sensor 40A for measuring the temperature of the single-stage sheet 22 and the temperature sensor 40B for measuring the temperature of the front liner 23 are shown, and the others are omitted).
  • the corrugated cardboard web 24A, the corrugated cardboard sheet 24B, and the plate-shaped corrugated cardboard sheet 24C are referred to as the corrugated cardboard sheet 24 when not distinguished from each other.
  • a device that affects the moisture content of the back liner 20 and a device that affects the moisture content of the front liner 23 are devices related to the warp in the sheet width direction of the cardboard sheet 24,
  • the back liner preheater 10 the core preheater 12, the single-stage sheet preheater 13, the front liner preheater 14, the single facer 11, the glue machine 15, and the double facer 16 are applicable.
  • a plurality of displacement sensors 7 used for warpage determination (and hence correction of warpage) of the cardboard sheet 24 are arranged on the stacker conveyor 191B (see FIG. 5) of the stacker 19. .
  • FIG. 2 is a schematic view showing the configuration of the back liner preheater 10, the single facer 11, and the core preheater 12.
  • FIG. 3 is a partial configuration of the single-stage sheet preheater 13, the front liner preheater 14, the glue machine 15, and the double facer 16.
  • FIG. 4 is a schematic diagram showing the configuration of the double facer 16
  • FIG. 5 is a schematic diagram showing the configuration of the stacker 19.
  • the back liner preheater 10 includes back liner heating rolls 101 ⁇ / b> A and 101 ⁇ / b> B arranged vertically in two stages here.
  • the back liner heating rolls 101A and 101B are heated to a predetermined temperature by supplying steam to the inside.
  • the back liner 20 guided in order by the guide rolls 105, 104A, 106, 104B is wound around the peripheral surfaces of the back liner heating rolls 101A, 101B, and the back liner 20 is preheated by the back liner heating rolls 101A, 101B. Yes.
  • the guide roll 104A provided in the vicinity of one back liner heating roll 101A is the tip of an arm 103A that is swingably attached to the axis of the back liner heating roll 101A.
  • the guide roll 104B provided in proximity to the other back liner heating roll 101B is supported at the tip of an arm 103B that is swingably attached to the shaft of the back liner heating roll 101B.
  • Each arm 103A, 103B can be moved to an arbitrary position within an angle range indicated by an arrow in the drawing by a motor (not shown).
  • the guide roll 104A, the arm 103A, and a motor (not shown) constitute the winding amount adjusting devices 102A and 102B, respectively.
  • the vapor pressure supplied to the back liner heating rolls 101A and 101B and the winding amount of the back liner 20 on the back liner heating rolls 101A and 101B by the winding amount adjusting devices 102A and 102B (The moisture content of the back liner 20 can be adjusted by changing the winding angle. Specifically, the greater the vapor pressure and the greater the amount of wrapping, the greater the amount of heat applied to the back liner 20 from the back liner heating rolls 101A, 101B, and the back liner 20 is dried and the water content is increased. Will drop.
  • the single facer 11 includes a pressure belt 113 wound around a belt roll 111 and a tension roll 112, and a surface formed in a wave shape so as to contact the pressure belt 113 in a pressurized state.
  • the upper roll 114, and the lower roll 115, which has a wave-like surface and meshes with the upper roll 114, are also provided.
  • the back liner 20 heated by the back liner preheater 10 is wrapped around the liner preheating roll 117 and preheated on the way, and then guided by the belt roll 111 and together with the pressure belt 113, the pressure belt 113 and the upper roll. It is transferred to the nip part with 114.
  • the intermediate core 21 heated by the intermediate core preheater 12 is wound around the intermediate core preheating roll 118 to be preheated, and after being wound around the meshing portion between the upper roll 114 and the lower roll 115, It is guided by the upper roll 114 and transferred to the nip portion between the pressure belt 113 and the upper roll 114.
  • a gluing device 116 In the vicinity of the upper roll 114, a gluing device 116 is disposed.
  • the gluing device 116 adjusts the amount of glue 30 attached to the peripheral surface of the gluing roll 116b, the gluing roll 116b gluing the gluing dam 116a storing the gluing 30, the middle core 21 conveyed by the upper roll 114, and the gluing roll 116b. It comprises a meter roll 116c and a glue scraping blade 116d that scrapes glue from the meter roll 116c.
  • the core 21 that has been wound around the meshing portion of the upper roll 114 and the lower roll 115 is glued to each top of the stage by the glue roll 116b, and is attached to the back liner 20 at the nip portion between the pressure belt 113 and the upper roll 114. It is pasted together. Thereby, the single-stage sheet
  • the single facer 11 can adjust the moisture content of the back liner 20 by changing the gap amount between the gluing roll 116b and the meter roll 116c. Specifically, as the gap amount is larger, the amount of glue on the bonding surface between the core 21 and the back liner 20 is increased, and the moisture content of the back liner 20 is increased by the moisture contained in the glue.
  • the gap amount can be adjusted by moving the meter roll 116c with respect to the gluing roll 116b.
  • the core preheater 12 has the same configuration as the back liner preheater 10 (here, the heating roll 121 is only one stage), and is heated to a predetermined temperature by supplying steam therein as shown in FIG. Furthermore, a core heating roll 121 and a winding amount adjusting device 122 that adjusts the winding amount (winding angle) of the core 21 around the core heating roll 121 are provided.
  • the winding amount adjusting device 122 includes a guide roll 124 around which the core 21 is wound, an arm 123 that is swingably attached to the shaft of the core heating roll 121 and supports the guide roll 124, and rotates the arm 123. It is composed of a motor that does not.
  • the single-stage sheet preheater 13 and the front liner preheater 14 are vertically arranged in two stages as shown in FIG. These preheaters 13 and 14 have the same configuration as the above-described back liner preheater 10.
  • the single-stage sheet preheater 13 includes a single-stage sheet heating roll 131 and a winding amount adjusting device 132.
  • the single-stage sheet heating roll 131 is heated to a predetermined temperature by supplying steam therein.
  • the back liner 20 side of the single-stage sheet 22 guided in order by the guide rolls 135 and 134 is wound around the peripheral surface of the single-stage sheet heating roll 131, and the back liner 20 side of the single-stage sheet 22 is preheated by the single-stage sheet heating roll 131. Yes.
  • the winding amount adjusting device 132 includes one guide roll 134, an arm 133 that is swingably attached to the shaft of the one-stage sheet heating roll 131 and supports the guide roll 134, and a motor (not shown) that rotates the arm 133.
  • the guide roll 134 is moved to an arbitrary position within the angle range indicated by the arrow in the figure by the control of the motor so that the winding amount (winding angle) of the single-stage sheet 22 around the single-stage sheet heating roll 131 can be adjusted. It has become.
  • the single-stage sheet preheater 13 includes the back liner 20 by changing the vapor pressure supplied to the single-stage sheet heating roll 131 and the amount of winding (wrapping angle) of the single-stage sheet 22 around the single-stage sheet heating roll 131.
  • the amount of moisture can be adjusted. Specifically, the greater the vapor pressure and the greater the amount of wrapping, the greater the amount of heat applied from the single-stage sheet heating roll 131 to the back liner 20, and the drying of the back liner 20 proceeds and the water content decreases. Will do.
  • the front liner preheater 14 includes a front liner heating roll 141 and a winding amount adjusting device 142.
  • the front liner heating roll 141 is heated to a predetermined temperature by supplying steam therein.
  • a front liner 23 guided in order by guide rolls 145 and 144 is wound around the peripheral surface of the front liner heating roll 141, and the front liner 23 is preheated by the front liner heating roll 141.
  • the winding amount adjusting device 142 includes one guide roll 144, an arm 143 that is swingably attached to the shaft of the front liner heating roll 141, and supports the guide roll 144, and a motor (not shown) that rotates the arm 143.
  • the guide roll 144 is moved to an arbitrary position within the angle range indicated by an arrow in the figure by controlling the motor so that the amount of winding (winding angle) of the front liner 23 around the front liner heating roll 141 can be adjusted. It has become.
  • the front liner preheater 14 contains the front liner 23 by changing the vapor pressure supplied to the front liner heating roll 141 or the amount of winding (winding angle) of the front liner 23 around the front liner heating roll 141.
  • the amount of moisture can be adjusted. Specifically, the greater the vapor pressure and the greater the amount of wrapping, the greater the amount of heat applied from the front liner heating roll 141 to the front liner 23, and the drying of the front liner 23 proceeds and the water content decreases. Will do.
  • the glue machine 15 includes a gluing device 151 and a pressure bar device 152.
  • the single-stage sheet 22 heated by the single-stage sheet preheater 13 is preheated by the single-stage preheating roll 155 and then guided in the glue machine 15 by the guide rolls 153 and 154 in order.
  • the gluing device 151 is disposed on the lower side (the center core 21 side) of the single-stage sheet 22, and the pressure bar device 152 is disposed on the upper side of the traveling line (the back liner 20 side). Has been.
  • the gluing device 151 includes a gluing dam 151a storing the gluing 31, a gluing roll 151b disposed in the vicinity of the travel line of the single-stage sheet 22, and a doctor roll 151c that contacts the gluing roll 151b and rotates in the same direction as the gluing roll 151b. It consists of and.
  • the pressure bar device 152 includes a pressure bar 152a disposed so as to sandwich the single-stage sheet 22 between the pressure bar 151b and an actuator 152b that presses the pressure bar 152a toward the glue roll 151b. Yes.
  • the single-stage sheet 22 is pressed toward the gluing roll 151b by the pressure bar 152a, and when passing between the pressure bar 152a and the gluing roll 151b, the gluing roll 151b glues the top of each step of the core 21. It has come to be.
  • the single-stage sheet 22 glued to the middle core 21 is bonded to the front liner 23 by the double facer 16 in the next process.
  • the glue machine 15 can adjust the moisture content of the front liner 23 by changing the gap amount between the gluing roll 151b and the doctor roll 151c. Specifically, as the gap amount increases, the amount of glue on the bonding surface of the core 21 and the front liner 23 increases, whereby the amount of water added to the front liner 23 increases and the water content in the front liner 23 increases. Will increase.
  • the gap amount can be adjusted by adjusting the position of the doctor roll 151c with respect to the gluing roll 151b.
  • the single-stage sheet 22 glued by the glue machine 15 is transferred to the double facer 16 of the next process.
  • the front liner 23 heated by the front liner preheater 14 is also transferred to the double facer 16 through the glue machine 15. At that time, the front liner 23 is preheated from the liner preheating roll 156 while being guided by the liner preheating roll 156 disposed in the glue machine 15.
  • a first shower device (back liner wetting device) 161 ⁇ / b> A is disposed on the back liner 20 side along the travel line of the single-stage seat 22, and a second shower device ( (Front liner wetting device) 161B is arranged.
  • These shower devices 161A and 161B are for adjusting the moisture content of the back liner 20 and the front liner 23, from the shower device 161A to the back liner 20, and from the shower device 161B to the front liner 23. Water is sprayed. And the moisture content of the back liner 20 increases according to the shower amount from the shower device 161A, and the moisture content of the front liner 23 increases according to the shower amount from the shower device 161B.
  • the shower devices 161A and 161B are controlled independently of each other.
  • the double facer 16 is divided into an upstream heating section 16 ⁇ / b> A and a downstream cooling section 16 ⁇ / b> B along the travel lines of the single-stage seat 22 and the front liner 23.
  • the heating section 16 ⁇ / b> A is provided with a plurality of hot plates 162, and the front liner 23 passes over these hot plates 162.
  • the hot plate 162 is heated to a predetermined temperature by supplying steam therein.
  • a loop-shaped pressure belt 163 travels on the hot plate 162 in synchronism with the single-stage sheet 22 and the front liner 23 across the travel line.
  • the pressure unit 164 is disposed so as to face the hot plate 162.
  • the pressurizing unit 164 includes a pressurizing bar 164a that is in sliding contact with the back surface of the pressurizing belt 163, and an actuator 164b that presses the pressurizing bar 164a against the heat plate 162 side.
  • the single-stage sheet 22 glued by the glue machine 15 is carried between the pressure belt 163 and the hot plate 162 from the pressure belt 163 side.
  • the front liner 23 heated by the front liner preheater 14 is preheated by the liner inlet preheating roll 165 and then carried between the pressure belt 163 and the hot plate 162 from the hot plate 162 side.
  • the single-stage sheet 22 and the front liner 23 are integrally transferred to the cooling section 16B in a state where they overlap each other. Go.
  • the single-stage sheet 22 and the front liner 23 are heated from the side of the front liner 23 while being pressurized via the pressure belt 163 by the pressure unit 164, thereby being bonded together to form a cardboard sheet web 24A.
  • the cardboard sheet web 24A is transferred to the slitter scorer 17 in the next process.
  • the double facer 16 can adjust the moisture content of the front liner 23 by changing the vapor pressure supplied to the hot plate 162 or the pressure applied by the pressurizing unit 164. Specifically, the greater the vapor pressure and the greater the applied pressure, the greater the amount of heat applied from the hot plate 162 to the front liner 23, and the drying of the front liner 23 proceeds and the water content decreases. become.
  • the moisture content of the front liner 23 can also be adjusted by the speed at which the single-stage sheet 22 and the front liner 23 pass through the double facer 16. In this case, the slower the passing speed is, the longer the time during which the front liner 23 is in contact with the hot plate 162, so that the drying of the front liner 23 proceeds and the water content decreases.
  • the stacker 19 includes a defect removing device 190, a stacker conveyor 191A, a stacker conveyor 191B, and a stack unit (upper sheet stack) 192 arranged in this order from the upstream side.
  • the defect removing device 190 is configured to change a switching unit between an old order and a new order in advance when an order change (for example, a change in the number of picks) of the plate-like cardboard sheet 24C, which is the final product, is performed. It is for cutting and removing with the cut length.
  • the normal plate-like cardboard sheets 24C that have passed through the defect removing device 190 are conveyed on the stacker conveyors 191A and 191B and sequentially stacked on the stack unit 192.
  • the stacker conveyor 191 ⁇ / b> A and the stacker conveyor 191 ⁇ / b> B have variable conveyance speeds, and are usually about 20% of the conveyance speed of the upstream double facer 16. Further, every time the plate-like corrugated cardboard sheet 24C is taken out, the conveying speed is reduced from the normal speed.
  • the upstream (following) plate-like cardboard is placed on the downstream (preceding) plate-like cardboard sheet 24C (only some of the plate-like cardboard sheets 24C are shown in FIG. 5).
  • the sheet 24C rides on and the plate-like cardboard sheets 24C are shingling (stacked like a roof tile).
  • a displacement sensor 7 for determining the warpage state of the plate-like cardboard sheet 24C is disposed on the stacker conveyor 191B.
  • a plurality of displacement sensors 7 are attached to the frame 71 and are provided at the same position in the sheet conveyance direction A (in other words, along the sheet conveyance direction W).
  • the stacker conveyors 191A and 191B may be stopped. At this time, the upstream devices only reduce the operation speed and the conveyance speed, so the stacker conveyors 191A and 191B are lower than during normal operation. Many plate-like cardboard sheets 24C single to 191A and 191B, and the stacking height of the plate-like cardboard sheets 24C on the stacker conveyor 191B also increases. In such a trouble, the displacement sensor 7 has a detection end serving as a lower end of the expected plate-like cardboard sheet 24C so that the stacked sheet-like cardboard sheets 24C do not collide with the displacement sensor 7.
  • the stacking height is set to a height (for example, a position about 400 mm higher than the transport surface of the stacker conveyor 191B).
  • the production management device 2 controls these devices 10, 11, 13 to 16, etc. as appropriate.
  • the production database 2 includes a knowledge database 3, a control amount calculation unit 4, a process controller 5, an operation state storage unit ( (Optimum driving state information storage means) 5A, warpage state determination unit (warpage state determination means) 8, and output device 9.
  • the output device 9 includes a display device or a printer (printing device), and outputs the warp state information output from the warp state determination unit 8 to the outside using at least one of image information and character information.
  • the control amount calculation unit 4 has a function as order information acquisition means of the present invention, and acquires order information from a higher-level production management system (not shown). Then, the control amount calculation unit 4 calculates each control amount according to the order information and the machine state information (operating state information) of the corrugated board manufacturing apparatus 1 acquired via the process controller 5, and the calculation result Is output to the process controller 5 as a control command.
  • the process controller 5 controls each control element based on a control command from the control amount calculation unit 4. In this way, matrix control is performed by the control amount calculation unit 4 and the process controller 5 based on the order information and the operation state information.
  • the process controller 5 keeps track of the machine state of the corrugated board manufacturing apparatus 1 and outputs the current machine state to the control amount calculation unit 4 periodically or in response to a request from the control amount calculation unit 4. . That is, the process controller 5 functions as a control unit and an operation state information acquisition unit according to the present invention.
  • the machine state refers to the operation speed of the corrugated board manufacturing apparatus 1 (sheet traveling speed), the amount of sheet wound around each of the heating rolls 101A, 101B, 121, 131, 141, and the heating rolls 101A, 101B, 121, 131, 141 vapor pressure, gap amounts between the rolls 116b, 114 and between the rolls 116b, 116c in the single facer 11, gap amount between the glued roll 151b and the doctor roll 151c in the glue machine 15, pressure unit in the double facer 16
  • These are the current values such as the pressure of 164, the vapor pressure of the hot plate 162, and the shower amounts of the shower devices 161A and 161B.
  • At least one piece of order information and operation state information is selected from those that affect the warpage of the cardboard sheet and stored in association with each other.
  • information paper width, flute, base paper composition, base paper basis weight and the like (that is, information on the plate-like cardboard sheet to be manufactured and information on the raw material of the plate-like cardboard sheet) are stored.
  • the double facer speed (passing speed on the single face sheet 22 and the double facer 16 of the front liner 23), the single stage sheet preheater 13 winding amount
  • the front liner preheater in the front liner preheater 14 Winding amount, back liner preheater winding amount in back liner preheater 10, single facer glue gap amount (gap amount between glue roll 116b and upper roll 114 or gap amount between glue roll 116b and meter roll 116c) ,
  • the glue machine glue gap amount (gap amount between the gluing roll 151b and the doctor roll 151c) and the double facer pressure (pressure force of the pressure unit 164) are stored.
  • the process controller 5 always keeps track of each order information as described above. For example, when the order of the corrugated cardboard sheet is switched, the current order matches the order [here, paper width, flute, The operation state storage unit 5A is searched for a data set in which the base paper configuration and the base paper basis weight match each other (including not only completely matching but also substantially matching).
  • the process controller 5 When the desired data set is found, the process controller 5 reads the operation state information of this data set as the optimum operation state information and controls the corresponding control elements so as to be in the optimum operation state. ing. Since this can be seen when the optimum operating state information is taught from the operating state storage unit 5A, this control is hereinafter referred to as teaching control. On the other hand, if the optimum operation state information corresponding to the current order is not found in the operation state storage unit 5A, the process controller 5 performs normal matrix control.
  • the driving state storage unit 5A also has a warping state (a warping amount and a warping shape) when the warping of the plate-like cardboard sheet 24C occurs and after the warping correction control (after the control of the specific control element). ) Or an order and memorize it.
  • the knowledge database 3 includes a set value of a control amount (adjustment amount from the current value) regarding a specific control element that affects the warp of the corrugated cardboard sheet 24 among the control elements for controlling the corrugated board manufacturing apparatus 1 or A set equation for setting the control amount is stored corresponding to each warp state of the cardboard sheet 24.
  • the warp state determination unit 8 described later determines that the production sheet width warp of the corrugated cardboard sheet 24 is an upward warp in the sheet width direction, the moisture content of the front liner 23 is increased.
  • the set value or the setting formula of the control amount of each control element is determined so as to reduce the moisture content of the back liner 20.
  • the warpage state determination unit 8 described later determines that the production sheet width warpage of the corrugated cardboard sheet 24 is downward warping (convex to the back liner 20 side), the moisture content of the back liner 20 is increased.
  • the set value or setting formula of the control amount of each control element is determined so that the moisture content of the front liner 23 is reduced.
  • a control element (specific control element) to be output is determined for the warp.
  • control elements of the present embodiment for example, the front liner side preheater winding amount (the winding amount of the front liner 23 around the front liner heating roll 141), the single stage preheater winding amount (the single stage sheet 22 around the single stage sheet heating roll 131).
  • Single facer / back liner side preheater winding amount (back liner heating roll 101A, 101B winding amount of back liner 20), single facer / core preheater winding amount (core heating roll 121) Amount of winding of the core 21), glue amount of glue machine (gap amount between the glue roll 151b and the doctor roll 151c), amount of single facer glue (gap amount between the glue roll 116b and the upper roll 114, or Gap amount between the gluing roll 116b and the meter roll 116c), Rufacer pressurizing force (pressurizing unit 164 pressurizing force), double facer operating speed, center core shower, single-sided cardboard sheet shower, front liner side shower, double facer hot plate vapor pressure (vapor pressure for each hot plate 162) .
  • the knowledge database 3 stores the operation state of the specific control element for each of the warp occurrence and after the control of the specific control element that affects the warpage of the cardboard sheet.
  • the control for correcting the warp is performed in a range in which the temperatures of the sheets 20, 21, 22, 23, 24A, 24B, and 24C detected by the temperature sensor do not fall below the reference temperature.
  • This reference temperature is a lower limit temperature set so that the glue applied for bonding the sheets 20, 21, 22, 23, 24A, 24B, and 24C does not fall below the gelling temperature.
  • the shape of the production sheet width warp is other than upper warp or lower warp (S-shaped warp, M-shaped warp, etc.)
  • an alarm is issued or the sheets 20, 21, 23, 24A, 24B
  • a specific control element for example, a double facer that can distribute the applied pressure to the hot plate 162 in the sheet width direction W with respect to any one of 24C, which can adjust the heating amount and the moisture content in the sheet width direction W. 16 or a shower capable of having a distribution in the sheet width direction W), the warp is corrected using this.
  • the control amount calculation unit 4 searches the knowledge database 3 based on the determination signal from the warpage state determination unit 8. And the setting value or setting formula of the control amount of each applicable control element is read from the knowledge database 3, and each control amount according to the machine state (operation state) of the corrugated board manufacturing apparatus 1 is calculated.
  • control amount calculation unit 4 converts all control elements to original values (matrix control based on order information such as base paper configuration, basis weight of base paper used, paper width, and flute). A command is sent to the process controller 5 so as to return to the determined value.
  • the process controller 5 comprehensively controls each of the devices 10 to 19 constituting the corrugated board manufacturing apparatus 1.
  • the process controller 5 normally controls the devices 10 to 19 by matrix control based on the order information.
  • the specific control elements defined by the knowledge database 3 one-stage sheet preheater winding amount in the single-stage sheet preheater 13, front liner preheater
  • the control amount calculated by the control amount calculation unit 4 is controlled by controlling the front liner preheater winding amount at 14, the back liner preheater winding amount at the back liner preheater 10, and the like.
  • the warpage control means of the present invention is configured by including the knowledge database 3, the control amount calculation unit 4 and the process controller 5, and includes the knowledge database 3, the control amount calculation unit 4, the process controller 5 and the warp state determination unit 8.
  • the warp correction apparatus of the corrugated board sheet manufacturing apparatus of the present invention is configured.
  • the process controller 5 controls the devices 10, 13, and 14 so that all control elements are returned to the original values.
  • the process controller 5 searches the operating state storage unit 5A for the optimal operating state corresponding to the current order, and when the optimal operating state is found, teaching control is performed.
  • each predetermined specific control element is preferentially adjusted to the optimum operating state.
  • the warpage state determination unit 8 determines the warpage state of each corrugated cardboard sheet 24C based on the detection results of the plurality of displacement sensors 7 while each plate-like cardboard sheet 24C is being conveyed by the stacker conveyor 191B. is there.
  • the plurality of displacement sensors 7 constitute the displacement amount measuring means of the present invention
  • the warpage state determination unit 8 constitutes the warpage determination apparatus of the corrugated board manufacturing apparatus of the present invention together with the plurality of displacement sensors 7, that is, the displacement amount measuring means.
  • the warpage state determination unit 8 determines the warpage shape and the warpage amount as the warpage state.
  • the warpage state determination unit 8 when the warpage amount is equal to or less than a predetermined amount, the warpage state determination unit 8 outputs the fact to the control amount calculation unit 4.
  • the control amount calculation unit 4 outputs the various order information and the various operation state information at this time as the optimal operation state information to the operation state storage unit 5A, and the operation state storage unit 5A outputs the order information and the operation information.
  • the state information is associated and stored as a data set. That is, the operation state when the warpage state determination unit 8 determines that the warpage amount is equal to or less than the predetermined amount is stored as the optimum operation state at the time of this order. Therefore, the warpage state determination unit 8 constitutes the quality information acquisition means of the present invention together with the displacement sensor 7.
  • determination of the warpage shape and determination of the warpage amount will be described.
  • FIG. 6 is a diagram for explaining warpage state determination according to the first embodiment of the present invention, and is a schematic plan view of a plurality of plate-like cardboard sheets conveyed on a stacker conveyor.
  • FIG. 6 for convenience, it is shown that there is no displacement of the plate-like corrugated cardboard sheet 24 ⁇ / b> C (variation of the leading end position in the sheet conveyance direction A) caused by shingling described later.
  • FIG. 7 is a diagram for explaining the displacement sensor according to the first embodiment of the present invention, and is a schematic perspective view of a plate-like cardboard sheet.
  • FIG. 8A and 8B are schematic diagrams for explaining a method for determining a warp shape according to the first embodiment of the present invention
  • FIG. 8A is a diagram showing a positional relationship between a plate-like cardboard sheet and a displacement sensor
  • FIG. 8B is a diagram showing a correspondence relationship between the measured value of the displacement sensor and the warped shape of the plate-like cardboard sheet.
  • FIG. 9 is a schematic diagram for explaining a method for determining a production sheet width warpage shape according to the first embodiment of the present invention, and a correspondence relationship between the warpage shape of each plate-like corrugated cardboard sheet and the production sheet width warpage shape.
  • FIG. 8A is a diagram showing a positional relationship between a plate-like cardboard sheet and a displacement sensor
  • FIG. 8B is a diagram showing a correspondence relationship between the measured value of the displacement sensor and the warped shape of the plate-like cardboard sheet.
  • FIG. 9 is a schematic diagram for explaining a method for determining a production sheet width warpage shape
  • the warpage state determination unit 8 includes a plurality of (three in this embodiment, the same width dimension (hereinafter, also referred to as slit width) W1) plate-like corrugated sheets arranged in the sheet width direction W.
  • the warp shape in the sheet width direction W is first determined, and the warp shapes of the plurality of plate-like cardboard sheets 24C are determined. Based on the above, a virtual warpage shape is determined when it is assumed that the cardboard sheet web 24A has not been vertically cut by the slitter scorer 17.
  • the warped shape of the cardboard sheet web 24A having the full width when the corrugated sheet web 24A is not cut by the slitter scorer 17 is referred to as a production sheet width warped shape.
  • the warp shape of each plate-like cardboard sheet 24C is determined based on the detection result of the displacement sensor 7 during the conveyance of each plate-like cardboard sheet 24C by the stacker conveyor 191B.
  • the displacement sensor 7 measures the amount of vertical displacement (distance indicated by a broken line arrow in FIG. 7) from the reference horizontal line L0 of the plate-like cardboard sheet 24C vertically below each measurement point P.
  • a plurality of displacement sensors 7 are arranged at equal intervals along the sheet width direction W over the maximum sheet width dimension Wmax that can be manufactured by the corrugated sheet manufacturing apparatus 1. ing.
  • a corrugated sheet web 24A (see FIG. 1) having a width dimension (hereinafter also referred to as a production sheet width) Wt smaller than the maximum sheet width dimension Wmax is equally divided into three, and each plate shape has a width dimension W1.
  • a production sheet width width dimension
  • the warpage state determination unit 8 acquires the production sheet width Wt as order information from the production management system, and based on the production sheet width Wt, the warp state determination unit 8 appropriately selects from among the displacement sensors 7 disposed over the maximum sheet width dimension Wmax.
  • the displacement sensor 7 at the position (in other words, vertically above the three plate-like corrugated cardboard sheets 24C) is selected as the one for determining the warping state, and here, the 30 displacement sensors 7 at the center are selected. .
  • each displacement sensor 7 measures the vertical displacement amount of the portion of the plate-like cardboard sheet 24C in the vertically lower direction as described above
  • the measurement point P shown in FIG. 6 of each displacement sensor 7 is the displacement sensor. 7 (that is, each measurement point P corresponds to the arrangement of each displacement sensor 7, for example, the leftmost measurement point P with respect to the sheet conveying direction A is This is the measurement location of the displacement sensor 7 arranged on the leftmost side). That is, with respect to the production sheet width Wt, 30 measurement points P are set at equal intervals along the sheet width direction W. More specifically, the measurement point P is set at the center of each width portion obtained by dividing the production sheet width Wt into 30 equal parts.
  • the warpage state determination unit 8 assigns a displacement sensor 7 to each of the plurality of plate-like cardboard sheets 24C arranged in the sheet width direction W according to the width dimension W1 (in other words, the plurality of displacement sensors 7).
  • the measurement range of the variable measurement means consisting of is assigned).
  • the arrangement of the displacement sensor 7 assigned to the plate-like cardboard sheet 24C is determined according to the arrangement of the cardboard cardboard sheet 24C.
  • the assigned number Ns of the displacement sensors 7 assigned to each plate-like cardboard sheet 24C is ten. Therefore, in FIG. 6, among the 30 displacement sensors 7 corresponding to the production sheet width Wt, the left-side plate-like cardboard sheet 24Ca is assigned with the 10 displacement sensors 7 on the left side, and the center plate-like shape.
  • the center ten displacement sensors 7 are assigned to the corrugated cardboard sheet 24Cb, and the ten rightward displacement sensors 7 are assigned to the right plate-shaped cardboard sheet 24Cc.
  • a plurality of displacement sensors 7 whose measurement points P are located on the plate-like cardboard sheet 24Ca are assigned to the plate-like cardboard sheet 24Ca as a group, and a plurality of displacement sensors 7 whose measurement points P are located on the plate-like cardboard sheet 24Cb are assigned.
  • a group is assigned to the plate-like cardboard sheet 24Cb, and a plurality of displacement sensors 7 whose measurement points P are located on the plate-like cardboard sheet 24Cc are assigned to the plate-like cardboard sheet 24Cc.
  • each displacement sensor 7 performs measurement at a predetermined time interval (hereinafter also referred to as a measurement interval) ⁇ t.
  • a measurement interval a predetermined time interval
  • the plate-like cardboard sheet 24C is measured at every conveyance distance corresponding to the measurement interval ⁇ t.
  • the measurement point P on the dash-dot line t1 indicates the measurement point P at the measurement time t1
  • the warpage state determination unit 8 informs the production management system to this effect (the width dimensions of each plate-like cardboard sheet 24C are Information indicating that they are the same, that is, that the cardboard sheet web 24A is equally cut vertically by the slitter scorer 17).
  • the width dimension W1 of the plurality of plate-like cardboard sheets 24C is the same, but the width dimension of the plurality of plate-like cardboard sheets 24C may not be the same.
  • the warpage state determination unit 8 acquires information indicating that the width dimensions of the respective plate-like cardboard sheets 24C are not the same from the production management system, and further, each of the corrugated board sheet webs 24A is obtained from the production management system. The width dimensions are acquired, and the displacement sensor 7 is assigned to each corrugated sheet web 24A according to these width dimensions).
  • the warpage state determination unit 8 determines the warp shape of each sheet width direction W on the stacker conveyor 191B of the plate-like cardboard sheets 24Ca, 24Cb, 24Cc.
  • the warpage state determination unit 8 further warps the sheet width direction W based on each of these warp shapes, in other words, assuming that the corrugated cardboard web 24A has not been cut vertically by the slitter scorer 17, in other words, Warpage shape in the sheet width direction W (production sheet width warpage shape) of the corrugated sheet web 24A having the production sheet width Wt when it is assumed that the corrugated sheet webs 24A (production sheet width Wt) are conveyed onto the stacker conveyor 191B. ).
  • the warpage of the plate-like cardboard sheets 24Ca, 24Cb, 24Cc is caused by heating imbalance (imbalance of moisture content) of the sheets 20, 21, 22, 23 in the manufacturing process before the longitudinal cutting by the slitter scorer 17 is performed. Is. For this reason, based on the production sheet width warpage shape that is directly affected by heating imbalance (imbalance of moisture content) of the sheets 20, 21, 22, and 23 before the longitudinal cutting is performed, as described above, the corrugated cardboard It is preferable to control a control element that affects the warpage of the sheet manufacturing apparatus. In addition, as described in the section “Problems to be Solved by the Invention”, the determination of the warped state is desired to be performed on the corrugated cardboard sheet 24 as close as possible to the moisture equilibrium state.
  • the warpage state determination unit 8 determines the warp shape of each sheet-like corrugated cardboard sheet 24Ca, 24Cb, 24Cc on the stacker conveyor 191B in the sheet width direction W, and based on these warp shapes.
  • the virtual production sheet width warp shape is determined when it is assumed that the slitter scorer 17 has not been cut vertically.
  • the warp state determination unit 8 has a plate-like cardboard sheet as shown in FIGS. 8A and 8B, respectively.
  • the warpage shape of 24C, and thus the production sheet width warpage shape, is determined at each measurement interval ⁇ t.
  • the warpage state determination unit 8 divides the displacement sensor 7 assigned to each plate-like cardboard sheet 24C having the slit width W1 as shown in FIG. 8A. That is, when viewed in the sheet conveying direction A (viewed from the rear side), the left sensor group 7L including the four displacement sensors 7 on the left side, the central sensor group 7C including the two displacement sensors 7 on the center, and the four on the right side. It is divided into a right sensor group 7R composed of two displacement sensors 7. Further, the warpage state determination unit 8 acquires the measurement values (vertical displacement amounts) of the displacement sensor 7 at the respective measurement points P1 to P10, and based on these measurement values, the average displacement amount d * and the measurement point P5. , P6 is calculated.
  • the warpage state determination unit 8 calculates from the measurement values of the displacement sensor 7 at the respective measurement points P1 to P10.
  • the measurement value at the leftmost measurement point P1 is used as a reference.
  • the displacement at the measurement location P5 is the difference between the measurement value at the measurement location P5 and the reference value (measurement value at the measurement location P5 ⁇ reference value).
  • the displacement at the measurement location P6 is the measurement value at the measurement location P6.
  • the reference value (measurement value at measurement point P6 ⁇ reference value).
  • the warpage state determination unit 8 obtains the slopes of the measurement values of the measurement points P1 to P4 on the left side of the plate-like cardboard sheet 24C by linear approximation based on the measurement values of the respective displacement sensors 7 of the left sensor group 7L (hereinafter, referred to as the following).
  • the slope that approximates this straight line is also called “the slope of the left straight line”).
  • the warpage state determination unit 8 obtains the slopes of the measurement values of the measurement points P7 to P10 on the right side of the plate-like cardboard sheet 24C by linear approximation based on the measurement values of the displacement sensors 7 of the right sensor group 7R. (Hereinafter, this linearly approximated slope is also referred to as “the slope of the right straight line”).
  • the warpage state determination unit 8 determines that the displacement amount at the measurement points P5 and P6 at the center of the plate-like cardboard sheet 24C is larger than the average displacement amount d * based on the measurement value of each displacement sensor 7 of the central sensor group 7C. Determine whether it is high or low.
  • the warpage state determination unit 8 has a slope of the left straight line that is lowering to the right, and the displacement amount of the measurement points P5 and P6 is larger than the average displacement amount d * (in other words, the center If the slope of the right straight line is rising to the right, the warp shape of the plate-like corrugated cardboard sheet 24C is determined to be upward, and the inclination of the left straight line is rising to the right.
  • the warp shape of the plate-like cardboard sheet 24C is determined as the downward warp.
  • the warpage state determination unit 8 determines that the left straight line and the right straight line are both rising right shoulders, and determines that it is an S-shaped warp in a normal posture. When both the left straight line and the right straight line are both right shoulder falling, It is determined as an S-shaped warp in the reverse posture.
  • the warpage state determination unit 8 has a straight line on the left side, and the displacement amount (center measurement value) of the measurement points P5 and P6 is larger than the average displacement amount d * (in other words, the height of the center portion is If it is lower than the average height) and the right straight line is descending to the right, it is determined as an M-shaped warp in the normal posture, and conversely, the left straight line is descending to the right and the amount of displacement at the measurement points P5 and P6 is If it is smaller than the average displacement d * (in other words, the height of the central portion is higher than the average height) and the right straight line rises to the right, it is determined as an M-shaped warp in the reverse posture.
  • the average displacement amount d * in other words, the height of the center portion is If it is lower than the average height
  • the right straight line is descending to the right
  • the amount of displacement at the measurement points P5 and P6 is If it is smaller than the average displacement d * (in other words, the height of the
  • the straight line on the left side rises, one of the displacement amounts at the measurement points P5 and P6 is larger than the average displacement amount d *, and the other displacement amount at the measurement points P5 and P6 is smaller than the average displacement amount d *.
  • the straight line on the left side is a downward slope, one of the displacement amounts at the measurement points P5 and P6 is larger than the average displacement amount d *, and the other displacement amount at the measurement points P5 and P6 is larger than the average displacement amount d *. If it is small and the right straight line rises to the right, it may be determined as an M-shaped warp in a reverse posture.
  • the warpage state determination unit 8 obtains the warp shapes of the respective plate-like cardboard sheets 24Ca, 24cb, 24Cc in this way, and produces them according to the combinations of the warp shapes of these respective plate-like cardboard sheets 24Ca, 24cb, 24Cc.
  • the shape of the sheet width warp is determined. For example, the shape of the production sheet width warp is determined as shown in FIG. 9 by the combination of the upper warp and the lower warp.
  • the warpage state determination unit 8 determines that the production sheet width warpage is an upward warp when each of the plate-like corrugated cardboard sheets 24Ca, 24Cb, 24Cc is determined to be an upward warpage, and each of the plate-like corrugated cardboard sheets When it is determined that 24Ca, 24Cb, and 24Cc are all warped, the production sheet width warp is determined to be warped. Further, the warpage state determination unit 8 determines that the plate-like cardboard sheet 24Ca is warped downward, determines that the plate-like cardboard sheet 24Cb is an S-shaped warp or the like in the reverse posture, and determines that the plate-like cardboard sheet 24Cc is warped upward.
  • the production sheet width warpage is determined to be an S-shaped warp in a normal posture
  • the plate-shaped cardboard sheet 24Ca is determined to be an upward warp
  • the plate-shaped cardboard sheet 24Cb is determined to be an S-shaped warp in a normal posture.
  • the production sheet width warp is determined as an S-shaped warp in a reverse posture.
  • the warpage state determination unit 8 determines that the production sheet width warpage is a normal posture when the plate-like cardboard sheets 24Ca and 24Cc at both ends are determined to be warped downward and the center plate-like cardboard sheet 24Cb is determined to warp upward.
  • the warpage state determination unit 8 finally determines the production sheet width warpage shape with respect to the warpage shape, but determines the warpage amount per sheet of the corrugated cardboard sheet 24C with respect to the warpage amount (that is, warpage). In the correction, the production sheet width warp shape is used as the warp shape, and the warp amount per sheet of the corrugated cardboard sheet 24C is used as the warp amount and warp factor.
  • FIG. 10 is a schematic diagram for explaining a method of determining the amount of warpage, and is a front view of a plate-like cardboard sheet.
  • the warped shape of the plate-like cardboard sheet 24C is warped upward or downward, the warped shape of each plate-like cardboard sheet 24C is approximated to an arc shape R as shown in FIG. Then, based on the radius (curvature radius) r of the arc shape R and the slit width W1 acquired from the production management system, the warpage amount ⁇ is calculated by the following equation (1). Further, based on the warpage amount ⁇ and the slit width W1, the warp factor WF is calculated by the following equation (2).
  • the approximation of the warped shape to the arc shape uses a known least square method from the average value of the measured values of the plate-like cardboard sheet 24C at each of the measurement points P1 to P10 obtained based on the measured values of the displacement sensor 7. Can be obtained.
  • the warpage state determination unit 8 obtains the warpage amount ⁇ and the warp factor WF from the above equations (1) and (2) for each of the plate-like cardboard sheets 24Ca, 24Cb, and 24Cc.
  • the average value of each warp amount ⁇ and the average value of the warp factor WF of the plate-like corrugated cardboard sheets 24Ca, 24Cb, 24Cc are adopted as the final warp amount ⁇ and the warp factor WF (used for warp correction).
  • the reason why the measured value of the displacement sensor 7 is approximated to the arc R in this way is as follows. For example, in FIG.
  • the warp amount in the sheet width direction W of the plate-like corrugated cardboard sheet 24 is the difference between the lowest position occurring at the center PL in the sheet width direction and the highest position occurring near both ends P0 and P11 in the sheet width direction.
  • the measurement points P1 and P10 closest to the end of the measurement points of each displacement sensor 7 often do not coincide with the sheet width direction ends P0 and P11 as shown in FIG.
  • the amount of warpage is larger than that of the measurement points P1 and P10.
  • the warpage amount ⁇ and the warp factor WF are calculated to be smaller than actual. Therefore, for example, even when the measurement values at the measurement points P1 and P10 are not adopted, the warp shape is approximated to the arc curve R from the measurement values P2 to P9, and the sheet width direction ends P0 and P11 on the arc curve R are approximated.
  • the displacement amount at is determined as the warpage amount ⁇ .
  • the warpage state determination unit 8 recalculates the circular arc curve R excluding the measured value d1.
  • the ruled line position can be acquired from the production management system.
  • the output device 9 assumes that the reproducibility by the arc curve R is low. An error display may be output.
  • the warp amount ⁇ is the maximum displacement amount and the minimum displacement amount in the measured values of the displacement sensor 7 assigned to the plate-like cardboard sheet 24C. Is calculated as the difference between
  • FIG. 11A and FIG. 11B are schematic diagrams for explaining a method for determining a warpage state in consideration of shingling according to the first embodiment of the present invention
  • FIG. 11A is a plate-like cardboard conveyed on a stacker conveyor.
  • FIG. 11B is a plan view showing a corrugated sheet web before being vertically cut.
  • the same numbers in parentheses indicate that the tips have been cut all at once by the cut-off 18.
  • the plate-like cardboard sheets 24Ca (1), 24Cb (1), 24Cc (1) are simultaneously cut at the leading edges by the cut-off 18, and the plate-like cardboard sheets 24Ca (2), 24Cb (2), 24Cc In (2), the front ends of the sheet-like cardboard sheets 24Ca (3), 24Cb (3), and 24Cc (3) are simultaneously cut by the cut-off 18 at the same time. ing.
  • the plate-like cardboard sheets 24Ca (1), 24Ca (2), and 24Ca (3) forming a row along the sheet conveying direction A are shingled, and similarly, the plate-like cardboard sheets 24Cb (1) and 24Cb (2 ), 24Cb (3) and the plate-like cardboard sheets 24Cc (1), 24Cc (2), 24Cc (3) are shingled.
  • the single ring is a stack of plate-like cardboard sheets that move back and forth with respect to the sheet conveying direction A. Therefore, the sheet row La made of the plate-like cardboard sheets 24Ca, the sheet row Lb made of the plate-like cardboard sheets 24Cb, A single ring is generated for each sheet row Lc composed of the plate-like cardboard sheets 24Cc.
  • the plate-like cardboard sheets 24Ca (1), 24Cb (1), and 24Cc (1) are cross-cut at the same time by the cut-off 18; It was.
  • the plate-like cardboard sheets 24Ca (1), 24Cb (1), and 24Cc (1) are made of corrugated cardboard as shown in FIG. 11B before longitudinal cutting by the slitter scorer 17 and cross cutting by the cut-off 18.
  • the region A1 along the sheet width direction W in the sheet web 24A was formed.
  • the plate-like cardboard sheets 24Ca (2), 24Cb (2), and 24Cc (2) are in the sheet width direction in the cardboard sheet web 24A before the longitudinal cutting by the slitter scorer 17 and the cross-cutting by the cut-off 18 are performed.
  • An area A2 along W was formed, and the plate-like cardboard sheets 24Ca (3), 24Cb (3), and 24Cc (3) formed an area A3 along the sheet width direction W in the cardboard sheet web 24A.
  • the shingling that occurs on the stacker conveyor 191B occurs for each of the sheet rows La, the sheet rows Lb, and the sheet rows Lc. Therefore, the occurrence of shingling differs for each of the sheet rows La, the sheet rows Lb, and the sheet rows Lc. Therefore, the sheet corrugated sheet 24Ca, 24Cb, 24Cc forming the sheet row La, the sheet row Lb, and the sheet row Lc is conveyed on the stacker conveyor 191B in a state where the leading end positions are also shifted. That is, as shown in FIG.
  • the plate-like cardboard sheets 24Ca (1), 24Cb (1), and 24Cc (1) that form the region A1 in the cardboard sheet web 24A so as to align the tip positions are the stacker conveyor 191B.
  • the leading ends are not aligned (shifted with respect to the sheet conveying direction A).
  • the plate-like cardboard sheets 24Ca (2), 24Cb (2), 24Cc (2) and the plate-like cardboard sheets 24Ca (3), 24Cb (3), 24Cc (3) are also shown on the stacker conveyor 191B as shown in FIG. 11A. The tips are not aligned.
  • the measurement point P of the displacement sensor 7 at the measurement time t3 extends over the plate-like cardboard sheets 24Ca (2) and 24Cb (2) and the plate-like cardboard sheet 24Cc (1).
  • the warp shapes of the plate-like corrugated cardboard sheets 24Ca (2), 24Cb (2), 24Cc (2) are determined based on the measurement value of the displacement sensor 7, and the production sheet width warp shape is further determined from these warp shapes, In other words, in order to determine the warped shape of the region A2, after the measurement of the plate-like cardboard sheet 24Cc (1) is completed at the measurement time t3, the plate-like cardboard sheet corresponding to the region A2 is measured after the measurement time t4. It is necessary to measure 24Cc (2).
  • the measurement object of the displacement sensor 7 is the downstream plate.
  • the corrugated cardboard sheet 24C is switched to the upstream corrugated cardboard sheet 24C, it is used that the measured value of each displacement sensor 7 increases stepwise by the sheet thickness. That is, when the measurement value of the displacement sensor 7 exceeds the threshold value set corresponding to the sheet thickness, compared to the measurement value in the previous measurement period of the plate-like cardboard sheet 24C (hereinafter also simply referred to as the period).
  • the plate-like cardboard sheets 24Ca, 24Cb are based on the timing when this threshold is exceeded. , 24Cc displacement amount is measured.
  • the measurement value of the displacement sensor 7 changes beyond the threshold value, so that the measurement value at the measurement time t2 or the measurement after the elapse of a predetermined measurement interval (or after the elapse of a predetermined time) from the measurement time t2. Based on the value, the warp shape of the plate-like cardboard sheet 24Cb (2) is determined.
  • the measurement object of the displacement sensor 7 is switched from the plate-like cardboard sheet 24Ca (1) to the plate-like cardboard sheet 24Ca (2). Since the measurement value changes beyond the threshold value, the plate-like corrugated cardboard sheet is based on the measurement value at the measurement time t3 or the measurement value after the elapse of a predetermined measurement interval (or after the elapse of a predetermined time) from the measurement time t3. The warp shape of 24Ca (2) is determined.
  • the measurement time of the displacement sensor 7 is switched from t3 to t4
  • the measurement object of the displacement sensor 7 is switched from the plate-like cardboard sheet 24Cc (1) to the plate-like cardboard sheet 24Cc (2).
  • the plate-like corrugated sheet is based on the measurement value at the measurement time t4 or the measurement value after the elapse of a predetermined measurement interval (or after the elapse of a predetermined time) from the measurement time t4.
  • the warped shape of 24Cc (2) is determined.
  • the measurement timing is set separately for each of the plate-like cardboard sheets 24Ca, 24Cb, 24Cc, even if each of the plate-like cardboard sheets 24Ca, 24Cb, 24Cc is shifted in the sheet conveying direction, It is possible to cancel, and the warp shape is determined for the plate-like cardboard sheets 24Ca, 24Cb, 24Cc forming the same region of the corrugated sheet web 24, and thus the production sheet width warpage of the region is accurately determined. Can do.
  • the sheet-like corrugated cardboard sheet 24 ⁇ / b> C after the longitudinal cutting by the slitter scorer 17 may be displaced with respect to the sheet width direction W.
  • the displacement sensor 7 is assigned to each plate-like cardboard sheet 24C, as shown in FIG. 12, if the plate-like cardboard sheet 24Cb is displaced so as to ride on the plate-like cardboard sheet 24Ca side, it is originally plate-like.
  • the measurement at the measurement point P10 to be measured for the cardboard sheet 24Ca measures the plate-like cardboard sheet 24Cb, resulting in noise in determining the warp shape and warpage amount of the plate-like cardboard sheet 24Ca. Therefore, the measurement location (for example, measurement location P10 in FIG.
  • the warpage state determination unit 8 does not use the measurement value of the displacement sensor 7 that measures the measurement location for the determination of the warp state.
  • the measurement of a specific displacement sensor 7 (the displacement sensor 7 that measures the measurement point P10 in the example shown in FIG. 12).
  • the value is equal to the thickness of the plate-like cardboard sheet 24C than the average value (representative value) of the measured values of the other displacement sensors 7 (displacement sensors 7 that measure the measurement points P1 to P9 in the example shown in FIG. 12).
  • the warpage state determination unit 8 may not use the measured value of the specific displacement sensor 7 for the warpage state determination.
  • the displacement sensor 7 is slidably fixed to the frame 71 (see FIG. 5) and provided with a driving means.
  • the slitter scorer 17 In a preset normal position, the slitter scorer 17 has a predetermined length from the vertical cutting position (the vertical cutting position).
  • the position of the displacement sensor 7 within the distance range may be adjusted so as to be out of the predetermined distance range.
  • the plurality of displacement sensors 7 arranged along the sheet width direction W are: According to each slit width W1 of the plate-like cardboard sheets 24C arranged side by side along the sheet width direction W, the plate-like cardboard sheets 24C are respectively assigned. Based on the measured value of the assigned displacement sensor 7, the warpage state (warpage shape and warpage amount) of each plate-like cardboard sheet 24C is determined.
  • the warped state of each plate-like corrugated cardboard sheet 24C can be determined. Accordingly, the warpage state can be determined in a state close to the cardboard sheet production completion state (completed state), and the warp correction can be performed with high accuracy based on this. Further, since the warpage determination is performed with respect to the plate-like cardboard sheet 24C on the upstream side of the stack portion 192, the warpage state of the plate-like cardboard sheet 24C stacked on the stack portion 192 on the most downstream side of the stacker 19 is fed back to warp correction.
  • the warpage state of the corrugated cardboard sheet can be determined at an early stage in a state close to the corrugated cardboard production completion state (completed state), and accordingly, the warp correction can be performed accurately and early based on this determination. Can do.
  • the warpage of the plate-like cardboard sheets 24Ca, 24Cb, 24Cc is caused by heating imbalance (imbalance of water content) of the sheets 20, 21, 22, 23 in the manufacturing process before longitudinal cutting by the slitter scorer 17. .
  • the effect of this imbalance is embodied in a form that is most easily understood as the production sheet width warp shape of the corrugated board web 24A before longitudinal cutting.
  • the warpage state determination unit 8 is based on each warpage state in the plurality of plate-like cardboard sheets 24Ca, 24Cb, 24Cc and the arrangement of the plurality of plate-like cardboard sheets 24Ca, 24Cb, 24Cc.
  • the warp shape (that is, the production sheet width warp shape of the corrugated cardboard web 24A before the vertical cutting) when it is assumed that the vertical cutting by the slitter scorer 17 has not been performed is determined. Therefore, based on the production sheet width warp shape in which the influence of the balance of the heating (containing moisture) of the sheets 20, 21, 22, 23 is directly embodied, the control elements that affect the warp of the corrugated board manufacturing apparatus 1 are By controlling, the warp can be corrected more accurately.
  • the warpage state is determined based on the measurement result. It is possible to determine the warpage state in a state closer to the final product state.
  • Each measurement by the plurality of displacement sensors 7 is performed on the plate-like cardboard sheets 24Ca, 24Cb, 24Cc in the single ring state on the stacker conveyor 191B.
  • the single ring state the measurement of the plate-like cardboard sheets 24Ca, 24Cb, 24Cc is performed.
  • the tip position is uneven.
  • the warpage state determination unit 8 selects a measurement value of the displacement sensor 7 used for determination of the warpage state for each of the plate-like cardboard sheets 24Ca, 24Cb, and 24Cc on the stacker conveyor 191B.
  • the amount of change with respect to the measurement value of the previous period of the measurement value of the displacement sensor 7 is set according to the thickness of the plate-like cardboard sheets 24Ca, 24Cb, 24Cc. It is selected based on the period exceeding the threshold value. That is, when the amount of change of the measured value of the displacement sensor 7 with respect to the measured value in the previous period exceeds the threshold value, the plate-like cardboard sheets 24Ca, 24Cb are moved from the upstream plate-like cardboard sheets 24Ca, 24Cb, 24Cc.
  • each of the warpage state determination units 8 is based on the width dimension (production sheet width) Wt and the number of the corrugated sheet webs 24A acquired from the production management system. While obtaining the slit width W1 of the plate-like corrugated cardboard sheet 24C, when the slitter scorer 17 picks up the slit width W1, the slit width of each of the plate-like cardboard sheets 24Ca, 24Cb, 24Cc is acquired from the production management system.
  • the warpage state determination unit 8 can easily determine the displacement sensor 7 assigned to each of the plate-like cardboard sheets 24C using the slit width.
  • the displacement sensor 7 detects the measurement object. There is a possibility that the measurement is performed not on the plate-like cardboard sheet 24C but on the board-like cardboard sheet 24C that has been ridden. Further, when the plate-like corrugated sheet 24C to be measured deviates from the regular conveyance path, the displacement sensor 7 is located with respect to a position where the plate-like corrugated sheet 24C to be measured is not located (for example, the upper surface of the stacker conveyor 191B). There is a risk of measuring.
  • the warpage state determination unit 8 of the present embodiment is a displacement within a predetermined distance from the end of the plate-like cardboard sheet 24C.
  • the detection result of the sensor 7 is not used for determining the warpage state.
  • the measurement value is a normal measurement value (the plate-like cardboard sheet to be measured).
  • the measured value for 24C is a value different from the thickness.
  • the warpage state determination unit 8 of the present embodiment uses a measurement value deviating from an average value (representative value) among the measurement values of the group of displacement sensors 7 assigned to the plate-like cardboard sheet 24C to be measured. Not used for judgment.
  • normal measurement values (measurement values relating to the plate-like cardboard sheet 24C to be measured) Can be used to accurately determine the warping state.
  • the warp amount of the plate-like cardboard sheet 24C is maximized at both ends thereof.
  • the warpage state determination unit 8 of the present embodiment approximates the warp shape to an arc shape when the warp shape is an upper warp or a lower warp, and uses the radius of curvature of the arc shape and the slit width W1 to form a plate shape.
  • the amount of warpage at the end of the cardboard sheet 24C is estimated. Therefore, the amount of warpage can be determined with high accuracy.
  • a specific control element related to the occurrence of the warp shape is selected from the control elements of the cardboard sheet manufacturing apparatus 1 and controlled.
  • the warp generated in the device 1 can be corrected efficiently.
  • the process controller 5 is measured by the sheet temperature measuring means.
  • the control amount of the specific control element is set so that the sheet temperature thus set does not fall below the lower limit temperature set based on the gelation temperature of the glue used for bonding. Therefore, it is possible to correct the warpage within a range that does not cause poor bonding.
  • At least one of the warp state information and the production sheet width warp state information of the plate-like corrugated cardboard sheet 24C determined by the warp state determination unit 8 is output based on at least one of character information and image information, and an output device 9 such as a display device or a printing device. Since it is displayed, it is easy for the operator to grasp the warped state and the production sheet width warped state.
  • the operation state of the control element (specific control element) that is highly relevant to the warp (production sheet width warpage) of the corrugated cardboard web 24A is stored in the operation state storage unit 5A for each time the warp occurs and after the control of the specific control element. Therefore, it is possible to analyze the mechanism of warpage occurrence and how the warpage has been corrected.
  • the warpage state determination unit 8 determines that the warpage amount is equal to or less than a predetermined value
  • the operation state at this time is stored as the optimum operation state corresponding to the current order, and thereafter, when the operation with the same order is performed, Control elements such as the double facer speed and the amount of wrapping of the single-stage sheet preheater in the single-stage sheet preheater 13 are preset to the optimum operating state by teaching control, so that the warpage can be controlled accurately and easily without relying on the experience and know-how of the operator. it can.
  • the feedback control for determining the state of the warp actually generated in the plate-like corrugated cardboard sheet 24C and correcting the warp based on this in the case of a short order (when the order of the corrugated cardboard sheet is switched in a short period of time), such feedback control is performed.
  • the liners 20 and 23 in a short order pass through a device capable of correcting the warp (in this case, the one-stage sheet preheater 13, the front liner preheater 14, and the back liner preheater 10) to suppress the warp. There is a possibility that it cannot be done.
  • the order is switched and the order of the corrugated board manufacturing apparatus 1 is switched. There is an advantage that it can be suppressed.
  • the corrugated cardboard sheet having no warp can be stably manufactured.
  • FIG. 13 is a schematic diagram illustrating a configuration of a warpage determination device according to a second embodiment of the present invention.
  • 14A and 14B are schematic diagrams for explaining a displacement amount measurement and warpage determination method according to the second embodiment of the present invention, and FIG. 14A shows an image (acquired image information) captured by an area sensor.
  • FIG. 14B is a diagram illustrating an example of the displacement information of the cardboard sheet obtained from the image information of FIG. 14A.
  • the warpage determination device of the present embodiment is provided in the corrugated board manufacturing apparatus and constitutes a warpage correction device.
  • the warpage determination device according to the first embodiment is configured to include a displacement amount measuring unit including a plurality of displacement sensors 7 and a warpage state determination unit 8.
  • the warpage determination device of the present embodiment includes a displacement amount measurement means 6 having an area sensor (imaging means) 61 and an image analysis means 62, and a warpage state determination unit 8A. Is done.
  • the stack 19 and the plate-like cardboard sheets 24C that shing upstream and downstream of the illustrated plate-like cardboard sheets 24C are omitted.
  • the area sensor 61 picks up images of a plurality of (in this case, three sheets with the same width) plate-like cardboard sheets 24Ca, 24Cb, 24Cc being conveyed by the stacker conveyor 191B (see FIG. 5) from the upstream side. And has an imaging range (number of pixels) that covers the maximum sheet width dimension Wmax (see FIG. 6).
  • FIG. 14A is an example of images of the plate-like cardboard sheets 24Ca, 24Cb, and 24Cc captured by the area sensor 61.
  • Such an image image information
  • the image analysis means 62 uses the image information to transfer the end faces in the transport direction of the plate-like cardboard sheets 24Ca, 24Cb, 24Cc (the end faces toward the sheet transport direction A).
  • the analysis by the image analysis means 62 analyzes the image information from the area sensor 61 to identify the conveyance direction end faces of the plate-like cardboard sheets 24Ca, 24Cb, 24Cc, and this conveyance direction end face is shown by a two-dot chain line in FIG. 14A. Using the difference from the virtual horizontal reference line L0 as the displacement amount, displacement amount information as shown in FIG. 14B is output to the warpage state determination unit 8A.
  • Each square shown in FIG. 14B indicates a pixel 61 a of the area sensor 61.
  • the pixels marked with ⁇ are the pixels 61a corresponding to the captured image of the end surface in the conveyance direction of the plate-like cardboard sheet 24C
  • the filled pixels 61a are the pixels 61a corresponding to the horizontal reference line L0. . Therefore, for example, the number of pixels between the circled pixel 61a and the black pixel 61a is used as the displacement amount information of the end surface in the conveyance direction of the plate-like cardboard sheet 24C.
  • the warpage state determination unit 8A acquires the production sheet width Wt as order information from the production management system in advance, and based on the production sheet width Wt, the warpage state determination unit 8A is in an appropriate range 60 from among all pixel ranges ( Here, the pixel 61a (which can image the end face in the conveyance direction of the three plate-like corrugated cardboard sheets 24C) is selected as one for determining the warp state.
  • the warpage state determination unit 8A obtains the width dimension W1 of each of the plate-like cardboard sheets 24Ca, 24Cb, 24Cc as order information from the production management system, and per sheet-like cardboard sheet 24C with respect to the production sheet width Wt.
  • the allocation ranges 60A, 60B, and 60C in the horizontal direction of the pixels (direction corresponding to the sheet width direction W) are determined according to the ratio of the width dimension W1.
  • the warpage state determination unit 8A determines the plate-like cardboard sheets 24Ca, 24Cb, 24Cc from the distribution of the displacement amount for each of the allocation ranges 60A, 60B, 60C, that is, the distribution of the displacement amount for each of the plate-like cardboard sheets 24Ca, 24Cb, 24Cc.
  • the warpage shape is determined every time, and the production sheet width warpage shape is determined from the warpage shapes of the plate-like corrugated cardboard sheets 24Ca, 24Cb, and 24Cc as in the first embodiment.
  • the number of pixels is reduced for convenience. Since other configurations are the same as those of the first embodiment, the description thereof is omitted.
  • the warpage determination device of the second embodiment of the present invention is configured in this way, the same effect as that of the first embodiment can be obtained.
  • the displacement amount of the plate-like cardboard sheet 24C conveyed on the stacker conveyor 191B is measured.
  • the plate-like cardboard sheet 24C conveyed on the stacker conveyor 191A and the slitter scorer 17 are cut. You may make it measure the displacement amount of the web-shaped corrugated-cardboard sheet
  • FIG. When measuring the displacement of the web-like corrugated cardboard sheet sheet 24B conveyed between the slitter scorer 17 and the cut-off 18, no shingling occurs, so that control related to shingling in the determination of the warped state is performed. It becomes unnecessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Abstract

La présente invention rend possible de déterminer une déformation dans une feuille de carton ondulé dans un état dans lequel la feuille de carton ondulé est presque terminée et à un stade précoce, et de corriger la déformation avec précision et à un stade précoce sur la base de la détermination de déformation. À cet effet, l'invention porte sur un dispositif de détermination de déformation pour un dispositif de fabrication de feuille de carton ondulé, lequel dispositif comporte : des moyens de mesure de quantité de déplacement pour mesurer des quantités de déplacement d'une pluralité de pièces de feuille de carton ondulé (24Ca, 24Cb, 24Cc) du côté aval d'une coupeuse-cisailleuse et du côté amont d'une unité d'empilement de feuilles ; et des moyens de détermination d'état de déformation pour diviser une plage de mesure des moyens de mesure de quantité de déplacement en fonction d'une dimension de largeur W1 de la pluralité de pièces de feuille de carton ondulé (24Ca, 24Cb, 24Cc), attribuer les plages de mesure divisées à chacune de la pluralité de pièces de feuille de carton ondulé (24Ca, 24Cb, 24Cc), et déterminer un état déformé des pièces de feuille de carton ondulé (24Ca, 24Cb, 24Cc) pour chacune de la pluralité de pièces de feuille de carton ondulé (24Ca, 24Cb, 24Cc) sur la base de valeurs de mesure à partir des moyens de mesure de quantité de déplacement dans les plages de mesure attribuées.
PCT/JP2016/055213 2015-12-04 2016-02-23 Dispositif de détermination de déformation pour dispositif de fabrication de feuille de carton ondulé, dispositif de correction de déformation pour dispositif de fabrication de feuille de carton ondulé et système de fabrication de feuille de carton ondulé WO2017094268A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP16870209.0A EP3369564B2 (fr) 2015-12-04 2016-02-23 Dispositif de détermination de déformation pour dispositif de fabrication de feuille de carton ondulé, dispositif de correction de déformation pour dispositif de fabrication de feuille de carton ondulé
US15/779,527 US11110680B2 (en) 2015-12-04 2016-02-23 Method of determining warp status for corrugated board

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-237678 2015-12-04
JP2015237678A JP6691766B2 (ja) 2015-12-04 2015-12-04 段ボールシート製造装置の反り判定装置，段ボールシート製造装置の反り矯正装置及び段ボールシート製造システム

Publications (1)

Publication Number Publication Date
WO2017094268A1 true WO2017094268A1 (fr) 2017-06-08

Family

ID=58796806

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/055213 WO2017094268A1 (fr) 2015-12-04 2016-02-23 Dispositif de détermination de déformation pour dispositif de fabrication de feuille de carton ondulé, dispositif de correction de déformation pour dispositif de fabrication de feuille de carton ondulé et système de fabrication de feuille de carton ondulé

Country Status (4)

Country Link
US (1) US11110680B2 (fr)
EP (1) EP3369564B2 (fr)
JP (1) JP6691766B2 (fr)
WO (1) WO2017094268A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019199052A (ja) * 2018-05-18 2019-11-21 株式会社ホニック 段成形検査方法
EP3369564B1 (fr) 2015-12-04 2020-05-06 Mitsubishi Heavy Industries Machinery Systems, Ltd. Dispositif de détermination de déformation pour dispositif de fabrication de feuille de carton ondulé, dispositif de correction de déformation pour dispositif de fabrication de feuille de carton ondulé

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021026146A1 (fr) * 2019-08-05 2021-02-11 Intpro, Llc Régulation de l'humidité spécifique du papier dans une bande de papier mobile
CN112748237B (zh) * 2020-12-29 2022-06-10 亚太森博(广东)纸业有限公司 一种复印纸原始翘曲检测方法
JP2023111099A (ja) * 2022-01-31 2023-08-10 三菱重工機械システム株式会社 検出装置、シート位置調整装置及びコルゲートマシン
DE102022208363A1 (de) * 2022-08-11 2024-02-22 Bhs Corrugated Maschinen- Und Anlagenbau Gmbh Wellpappenanlage sowie Verfahren zur Überprüfung einer Planlage von Bögen aus Wellpappe
DE102022209637A1 (de) 2022-09-14 2024-03-14 Bhs Corrugated Maschinen- Und Anlagenbau Gmbh Verfahren zur Herstellung einer Wellpappenbahn mittels einer Wellpappenanlage, Wellpappenanlage, Computerprogrammprodukt
DE102022209636A1 (de) 2022-09-14 2024-03-14 Bhs Corrugated Maschinen- Und Anlagenbau Gmbh Verfahren zum Betrieb einer Wellpappenanlage, Wellpappenanlage, Computerprogrammprodukt, Papierrolle
CN115639870B (zh) * 2022-12-21 2023-04-04 苏州沸特纸业有限公司 一种用于瓦楞纸板生产的智能控制方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0186524U (fr) * 1987-11-30 1989-06-08
JPH11216786A (ja) * 1998-02-02 1999-08-10 Ueno Hiroshi 反りの無い段ボールの貼合方法及び装置
JP3735302B2 (ja) * 2001-08-09 2006-01-18 三菱重工業株式会社 段ボールシートの反り矯正システム

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0682237A (ja) 1992-09-01 1994-03-22 Mitsubishi Heavy Ind Ltd 板状製品の反り計測方法
US5837974A (en) 1996-10-16 1998-11-17 Interfic, Inc. Corrugated paperboard manufacturing apparatus with board profile monitoring and related methods
JP2003231193A (ja) 2002-02-07 2003-08-19 Mitsubishi Heavy Ind Ltd 段ボールシートの製造システム
WO2003066319A1 (fr) 2002-02-05 2003-08-14 Mitsubishi Heavy Industries, Ltd. Systeme de production de feuilles en carton ondule
GB2415259B (en) 2004-06-16 2009-03-25 Christopher St John Cordingley Measuring warp in planar materials
EP2503421A1 (fr) 2011-03-25 2012-09-26 Gustavo Eduardo Sandoval Thiele Système pour contrôler le statut de déformation d'une feuille de carton ondulé dans la chaîne de production
DE102014202537A1 (de) * 2014-02-12 2015-08-13 Bhs Corrugated Maschinen- Und Anlagenbau Gmbh Wellpappe-Anlage
WO2015136125A1 (fr) † 2014-03-10 2015-09-17 Eanton Lec, S.L.N.E. Procédé et système de correction des courbures de plaques en carton pendant leur processus de fabrication
JP6691766B2 (ja) 2015-12-04 2020-05-13 三菱重工機械システム株式会社 段ボールシート製造装置の反り判定装置，段ボールシート製造装置の反り矯正装置及び段ボールシート製造システム

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0186524U (fr) * 1987-11-30 1989-06-08
JPH11216786A (ja) * 1998-02-02 1999-08-10 Ueno Hiroshi 反りの無い段ボールの貼合方法及び装置
JP3735302B2 (ja) * 2001-08-09 2006-01-18 三菱重工業株式会社 段ボールシートの反り矯正システム

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3369564A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3369564B1 (fr) 2015-12-04 2020-05-06 Mitsubishi Heavy Industries Machinery Systems, Ltd. Dispositif de détermination de déformation pour dispositif de fabrication de feuille de carton ondulé, dispositif de correction de déformation pour dispositif de fabrication de feuille de carton ondulé
JP2019199052A (ja) * 2018-05-18 2019-11-21 株式会社ホニック 段成形検査方法

Also Published As

Publication number Publication date
EP3369564A4 (fr) 2019-06-26
JP2017100424A (ja) 2017-06-08
EP3369564A1 (fr) 2018-09-05
EP3369564B1 (fr) 2020-05-06
US20180345618A1 (en) 2018-12-06
US11110680B2 (en) 2021-09-07
EP3369564B2 (fr) 2024-09-11
JP6691766B2 (ja) 2020-05-13

Similar Documents

Publication Publication Date Title
WO2017094268A1 (fr) Dispositif de détermination de déformation pour dispositif de fabrication de feuille de carton ondulé, dispositif de correction de déformation pour dispositif de fabrication de feuille de carton ondulé et système de fabrication de feuille de carton ondulé
EP3305486B1 (fr) Dispositif de coupe de feuille en carton, unité de commande de coupe pour celui-ci, et appareil de fabrication de feuille en carton
JP4568266B2 (ja) 無加工の耳を有する紙匹および段ボール紙の位置制御方法およびその装置
EP3556548B1 (fr) Appareil de transport d'unité de rouleau d'ondulation et appareil et procédé de remplacement d'unité de rouleau d'ondulation
US20230245297A1 (en) Device and method for detecting defect in corrugated cardboard sheet, device for eliminating defect in corrugated cardboard sheet, and device for manufacturing corrugated cardboard sheet
JP2017094717A (ja) 段ボール機
JP4718981B2 (ja) コルゲートマシンおよびこれに用いる生産管理装置
EP3431277B1 (fr) Dispositif et procédé d'élimination d'une feuille défecteuse, et dispositif de production de feuille cartonnée
US20160236438A1 (en) Device and method for preventing warping of double-faced corrugated cardboard sheet and manufacturing apparatus for double-faced corrugated cardboard sheet
JP3905767B2 (ja) 段ボールシートの反り矯正システム
JP2019177652A (ja) 段ボールシートの製造装置
JP4563311B2 (ja) コルゲートマシンおよびこれに用いる生産管理装置
JP3735302B2 (ja) 段ボールシートの反り矯正システム
US20240051253A1 (en) Device for detecting paper splice part of cardboard sheet, and device for producing cardboard sheet
JP3477331B2 (ja) 反り発生防止装置付き貼合シート材製造システム
JP4718980B2 (ja) コルゲートマシンおよびこれに用いる生産管理装置
JP2003231193A (ja) 段ボールシートの製造システム
JP2019188501A (ja) 段ボールシートの切断システム及び方法並びに段ボールシートの製造装置
JP2003266566A (ja) 段ボールシートの反り検出装置及び段ボールシートの反り検出方法
JP3905779B2 (ja) 段ボールシートの反り矯正システム
JP2002224748A (ja) ウェブの平面性保持方法及び平面性矯正装置
US5879004A (en) Method and apparatus for corrugating a flat material

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16870209

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2016870209

Country of ref document: EP